java语言综合设计实验报告(2)

panel3.add(button[8]);

button[8].addActionListener(this); panel3.add(button[9]);

button[9].addActionListener(this); panel3.add(buttonDiv);

buttonDiv.addActionListener(this); panel3.add(buttonSin);

buttonSin.addActionListener(this); panel3.add(buttonPI);

buttonPI.addActionListener(this); panel3.add(buttonMR);

buttonMR.addActionListener(this); panel3.add(button[4]);

button[4].addActionListener(this); panel3.add(button[5]);

button[5].addActionListener(this); panel3.add(button[6]);

button[6].addActionListener(this); panel3.add(buttonMul);

buttonMul.addActionListener(this); panel3.add(buttonCos);

buttonCos.addActionListener(this); panel3.add(buttonDS);

buttonDS.addActionListener(this); panel3.add(buttonMS);

buttonMS.addActionListener(this); panel3.add(button[1]);

button[1].addActionListener(this); panel3.add(button[2]);

button[2].addActionListener(this); panel3.add(button[3]);

button[3].addActionListener(this); panel3.add(buttonSub);

buttonSub.addActionListener(this); panel3.add(buttonTan);

buttonTan.addActionListener(this); panel3.add(buttonX2);

buttonX2.addActionListener(this); panel3.add(buttonMAdd);

buttonMAdd.addActionListener(this); panel3.add(button[0]);

button[0].addActionListener(this); panel3.add(buttonAddAndSub);

buttonAddAndSub.addActionListener(this);

后

}

panel3.add(buttonDot);

buttonDot.addActionListener(this); panel3.add(buttonAdd);

buttonAdd.addActionListener(this); panel3.add(buttonEqual);

buttonEqual.addActionListener(this); panel3.add(buttonSqrt);

buttonSqrt.addActionListener(this);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack();

frame.setVisible(true);

// 设置各个按钮行为

public void actionPerformed(ActionEvent event) { Object temp = event.getSource(); try {

// 如果按下数据按钮，将按下的按钮代表的数据插入的当前文本框字符串之for (int i = 0; i <= 9; i++)

if (temp == button[i] && clickable == true) { if(resultIndicate) {

textAnswer.setText(\); clickable = true;

textAnswer.setText(textAnswer.getText() +

Integer.toString(i)); }

else {

textAnswer.setText(textAnswer.getText() + Integer.toString(i)); } }

// 按下′.′按钮时，判断当前文本框内字符串中含不含′.′，如果已含，则不允许再插入′.′

if (temp == buttonDot && clickable == true) { boolean isDot = false;

if (textAnswer.getText().length() == 0) { //isDot = true; isDot = false; dotFlag = true; }

for (int i = 0; i < textAnswer.getText().length(); i++) if ('.' == textAnswer.getText().charAt(i)) { isDot = true; break;

}

if (isDot == false) { if (dotFlag)

textAnswer.setText('0' + \); else

textAnswer.setText(textAnswer.getText() + \); } }

if ((temp == buttonAdd || temp == buttonSub || temp == buttonMul ||

temp == buttonDiv) && clickable == true) { // ′+′操作

if (temp == buttonAdd) { switch (prekey) { case 0:

answerd +=

Double.parseDouble(textAnswer.getText()); break; case 1:

answerd -=

Double.parseDouble(textAnswer.getText()); break; case 2:

answerd *=

Double.parseDouble(textAnswer.getText()); break; case 3: if (Double.parseDouble(textAnswer.getText()) == 0) {

textAnswer.setText(\除数不能为零\); clickable = false; } else

answerd /=

Double.parseDouble(textAnswer.getText()); break; default:

answerd =

Double.parseDouble(textAnswer.getText()); }

textAnswer.setText(\); prekey = key = 0; }

// ′-′操作

if (temp == buttonSub) { switch (prekey) { case 0:

answerd +=

Double.parseDouble(textAnswer.getText()); break; case 1:

answerd -=

Double.parseDouble(textAnswer.getText()); break; case 2:

answerd *=

Double.parseDouble(textAnswer.getText()); break; case 3: if (Double.parseDouble(textAnswer.getText()) == 0) {

textAnswer.setText(\除数不能为零\); clickable = false; } else

answerd /=

Double.parseDouble(textAnswer.getText()); break; default:

answerd =

Double.parseDouble(textAnswer.getText()); }

textAnswer.setText(\); prekey = key = 1; }

// ′*′操作

if (temp == buttonMul) { switch (prekey) { case 0:

answerd +=

Double.parseDouble(textAnswer.getText()); break; case 1:

answerd -=

Double.parseDouble(textAnswer.getText()); break; case 2:

answerd *=

Double.parseDouble(textAnswer.getText()); break; case 3: if (Double.parseDouble(textAnswer.getText()) == 0) {

textAnswer.setText(\除数不能为零\); clickable = false; } else

answerd /=

Double.parseDouble(textAnswer.getText()); break; default:

answerd =

Double.parseDouble(textAnswer.getText()); }

textAnswer.setText(\); prekey = key = 2; }

// ′/′操作

if (temp == buttonDiv) { switch (prekey) { case 0:

answerd +=

Double.parseDouble(textAnswer.getText()); break; case 1:

answerd -=

Double.parseDouble(textAnswer.getText()); break; case 2:

answerd *=

Double.parseDouble(textAnswer.getText()); break; case 3: if (Double.parseDouble(textAnswer.getText()) == 0) {

textAnswer.setText(\除数不能为零\); clickable = false; } else

answerd /=

Double.parseDouble(textAnswer.getText()); break;